Centrifugal Sifter
The Centrifugal Sifter was developed by Xinxiang Jiarui Mechanical & Electrical Manufacturing Co., Ltd. with the aim of meeting the GMP certification process requirements of the pharmaceutical and food industries. It is the result of extensive optimization, innovation, and refinement based on traditional air-jet screens.
The Centrifugal Sifter features a cylindrical screen housed within the machine. After passing through a screw conveyor system, the material is mixed with an air stream, atomized, and fed into the screen cylinder. The impeller blades inside the cylinder subject the material to both centrifugal force and cyclonic thrust, The raw material mixture enters the machine through the air inlet. With the assistance of an intelligent turbine, the individual particles are dispersed and pass through the composite screen in an orderly manner, proceeding in the direction of the airflow to the next process step, while non-compliant impurities and foreign matter are intercepted and discharged through the automatic discharge port. This achieves the goal of highly efficient separation. The machine is widely used in industries such as metallurgy, mining, pharmaceuticals, food, chemicals, metal powders, and non-metals.
What is centrifugal sifting
The Centrifugal Sifter is a high-precision screening device specifically designed for processing fine powders. It breaks away from the traditional screening principle that relies on gravity and pioneers a new approach to kinetic screening that utilizes high-speed airflow as a carrier. Its core operating principle involves using airflow within a sealed system to fully disperse and suspend powder particles, propelling them with sufficient kinetic energy toward a vertically mounted screen, thereby achieving rapid and efficient classification based on particle size. This design is particularly well-suited for processing powdered materials ranging from 80 to 500 mesh (and even finer up to 600 mesh). It is especially effective at resolving screen clogging issues associated with “difficult-to-screen powders”—such as those that are lightweight, prone to agglomeration, electrically charged, or sticky—and typically achieves a screening efficiency of over 95%.
As a manufacturer with over twenty years of deep industry experience, Jiarui Electromechanical offers Centrifugal Sifters and customization services that provide significant advantages in meeting high-standard industrial requirements. The company offers comprehensive custom-engineering services, tailoring the overall machine dimensions, pneumatic systems, screen frame structures, mesh sizes, and even supporting systems based on customers’ on-site conditions, material characteristics (such as high-risk powders in the lithium-ion battery, fine chemicals, and pharmaceutical industries), explosion-proof ratings, and production capacity requirements. For example, the company’s independently developed JRQ800-1S pneumatic centrifugal sifter uses a pure air-powered drive to replace traditional electric motors, eliminating the risk of electrical sparks at the source and meeting the requirements of special explosion-proof operating conditions. The equipment is also equipped with an optimized adhesive-bonded mesh frame and silicone vibration balls, which automatically clean the screen to prevent clogging, significantly improving screening efficiency and continuous operation performance. Additionally, Jiarui Electromechanical supports OEM and ODM manufacturing partnerships. Leveraging its fully in-house R&D and manufacturing production lines, the company provides one-stop, turnkey solutions for high-risk powder production, ensuring the efficient, safe, and stable operation of the equipment.
Working Principle of Centrifugal Sifter
The Centrifugal Sifter is a high-precision screening device specifically designed for the efficient classification of ultrafine powders (80 to 500 mesh). It completely departs from the operating principle of traditional screeners, which rely on the gravitational potential energy of the material, and pioneers a new screening method that uses high-speed airflow as a carrier and harnesses the kinetic energy of the carrier fluid to perform the work. Its core objective is to project fully dispersed powder particles onto the screen mesh with sufficient kinetic energy in a sealed environment, thereby achieving rapid and precise separation. It is particularly effective at processing “difficult-to-screen” materials that are lightweight, prone to agglomeration, or electrically charged.
Its operating principle can be broken down into the following key steps:
Step 1: Mixing and Atomization: The material first passes through a screw conveyor system, where it is thoroughly mixed with a high-speed airflow and atomized, forming a gas-solid two-phase flow. This process effectively breaks up the material’s initial agglomerated state, laying the foundation for subsequent single-particle classification.
Step 2: Kinetic Energy Impartation and Ejection: The mixed gas-solid two-phase flow enters the interior of the cylindrical screen cylinder. The high-speed impeller blades inside the screen cylinder subject the material to both powerful centrifugal force and cyclonic propulsion. Under the combined action of these two forces, the material particles acquire sufficient kinetic energy and are propelled at high speed toward the screen mesh.
Step 3: Classification and Screening: Fine powder particles that are light in mass and meet size specifications are carried by the kinetic energy of the airflow, passing smoothly through the screen mesh openings and exiting through the fine material discharge port to proceed to the next process. Coarse particles and impurities that are too large or insufficiently dispersed cannot pass through the screen mesh and are flung toward the inner wall of the screen cylinder by centrifugal force.
Step 4: Automatic Screen Cleaning and Discharge of Residue: While propelling the material, the high-speed airflow continuously washes over the screen surface. This process itself serves as an efficient automatic screen-cleaning mechanism, effectively preventing fine powder from adhering to or clogging the screen. Additionally, during operation, non-conforming coarse material moves along the inner wall of the screen cylinder and is ultimately discharged from the machine through a separate coarse material outlet (automatic residue discharge port), enabling continuous operation.
This aerodynamic design gives the Centrifugal Sifter significant advantages when processing ultrafine powders, including high screening efficiency (up to 95% or higher), high throughput (5–10 times that of traditional vibrating screens), no screen clogging, and high precision. It is widely used in demanding industries such as chemicals, pharmaceuticals, food, and metallurgy.
Applications of the Centrifugal Sifter
A centrifugal sifter is a piece of equipment that uses high-speed airflow as both a carrier and a power source to perform high-precision screening of fine powders. Its core advantage lies in its ability to process powders that are prone to agglomeration, ultrafine, and lightweight, effectively addressing issues such as screen clogging and insufficient precision associated with traditional vibrating screens.
The Centrifugal Sifters manufactured by Jiarui Machinery are used across a wide range of industries and play a critical role, particularly in the following sectors that have specific requirements for screening precision, safety, and material properties:
Pharmaceutical raw material powders
Coffee powder
Flour
Milk powder
Ceramic powders
Iron ore powder
Quartz sand
Rubber powder
Below is a list of commonly screened materials that we have compiled:
| Industry | Core Applications (Main Screening Materials) | Special Value & Process Requirements |
|---|---|---|
| Pharmaceutical Industry | Pharmaceutical raw material powders, Traditional Chinese medicine powders, Active Pharmaceutical Ingredients (API) | Ensuring drug efficacy: precise particle size distribution directly affects dissolution rate and bioavailability. Strict safety control: fully enclosed design prevents cross-contamination and meets GMP (Good Manufacturing Practice) requirements. |
| Food Industry | Flour, starch, milk powder, sugar powder, cocoa powder, coffee powder, food additives, flavoring powders | Improving texture: fine classification ensures product fineness and mouthfeel. Ensuring safety: effective impurity removal meets food-grade hygiene standards and guarantees food safety. |
| Chemical & New Materials Industry | Resin powder, pigments, coatings, powder coatings, plastic additives, catalysts, rubber powder, metal powders (zinc, iron, etc.), lithium battery materials, ceramic powders, graphite powder | Solving processing challenges: efficient screening of high-viscosity and static-prone materials. Ensuring quality: strict particle size distribution control for fine chemicals and new materials, ensuring stable product performance. |
| Metallurgy, Mining & Building Materials Industry | Iron ore powder, coal ash, cement, quartz sand, alumina, light/heavy calcium powder, gypsum powder | Precise classification: accurate particle grading of various mineral powders to meet downstream smelting or processing specifications. |
In addition, it has specific applications in industries such as papermaking, animal feed, salt production, and electronic materials (e.g., silica fume).
Overall, in any powder processing scenario involving fine powders (typically 10–500 mesh), powders prone to agglomeration, powders with good flowability, or those requiring high screening accuracy and purity, the centrifugal sifter is one of the preferred pieces of equipment.
If your industry is not listed above, please feel free to contact Jiarui Machinery to determine if there is a better solution for your screening needs.
At Jiarui Machinery, we can provide screening solutions ranging from standard models to highly customized options tailored to the specific requirements of your industry.
Centrifugal Sifter Parts
As a high-precision screening device, the centrifugal sifter (also known as an air-jet sifter) relies on its core components working in concert to achieve efficient separation of fine powders. The following is a summary of its main components and their functions:
| System | Component | Function |
|---|---|---|
| Screening System | Screen Mesh / Standard Sieves | Core separation element for particle size classification. Mesh range typically 10–800 mesh. |
| Screening System | Screen Disc / Holder | Fixes and supports sieves, ensuring sealing and stability. |
| Power & Airflow System | Negative Pressure Generator (Vacuum Source) | Generates airflow to drive fine particles through the screen. |
| Power & Airflow System | Air Compressor / Vortex Generator | Produces and regulates high-speed airflow in some systems. |
| Power & Airflow System | Jet System & Nozzles | Directs airflow to fluidize material and ensure uniform screening. |
| Drive System | Impeller / Blade System | Provides centrifugal force and airflow to push material through the screen; affects efficiency and anti-clogging performance. |
| Drive System | Motor | Drives impeller or airflow system; speed adjustable for different materials. |
| Control System | Touchscreen Control Panel | Sets parameters such as time, vacuum level, speed, and data storage. |
| Control System | Microcontroller / Control Unit | Manages system operation and automation logic. |
| Collection System | Sample Collector | Collects fine powder; efficiency can reach up to 99.99%. |
| Structure System | Screening Chamber / Housing | Provides sealed environment to prevent dust leakage. |
| Auxiliary Components | Hoses / Brushes / Seals / Covers | Support connection, cleaning, sealing, and structural stability. |
Taking the Jiarui JRQ800-1S pneumatic sieve as an example, it integrates many of the advanced components mentioned above, such as an imported vortex generator, a touchscreen, a microcontroller, and a negative-pressure sensor, and features extended functions, including automatic screen cleaning (screen-opening function) and data printing.
Screw Conveyor System
Viewing port
Fine Material Discharge Outlet
Spindle
Viewing port
Wire Cage
Centrifugal Sifter Specifications
Below are the commonly used models from Jiarui Machinery. Taking into account factors such as your material characteristics, production capacity requirements, screening accuracy, operating conditions (e.g., explosion-proof, sterile), and budget, we also offer fully customized equipment.
Below are some examples of our mainstream models for your reference:
| Model | A (mm) | B (mm) | C (mm) | D (mm) | E (mm) | F (mm) | G (mm) | H (mm) | I (mm) | J (mm) | Material | Application |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| JR-WQ18-65 | 1430 | 460 | 420 | 1005 | 135 | 230 | 250 | 330 | 340 | 210 | Q235A / SUS304 | Below 500 mesh screening |
| JR-WQ30-100 | 1845 | 655 | 766 | 1240 | 320 | 285 | 300 | 350 | 380 | 290 | Q235A / SUS304 | Below 500 mesh screening |
| JR-WQ50-130 | 2230 | 870 | 790 | 1775 | 280 | 515 | 150 | 660 | 400 | 485 | Q235A / SUS304 | Below 300 mesh screening |
Customization Available
We provide full customization solutions to meet different industrial screening needs. From capacity requirements to material characteristics, each Centrifugal Sifter can be tailored for your production line.
You can customize machine size, material (carbon steel or SUS304), mesh range, airflow system, voltage, and discharge design. Optional upgrades such as ultrasonic anti-clogging systems and enhanced feeding structures are also available.
Contact us with your application details, and our engineering team will design the most efficient screening solution for your process.
Why Choose Jiarui Centrifugal Sifter?
Advanced Technical Expertise & Tailored Customization Capabilities
Industry-Proven Engineering: Over a decade of manufacturing experience ensures exceptional stability and low-noise operation.
Flexible Customization: Available with customized screen diameters, mesh sizes, deck configurations, contact materials, voltages, and feeding systems to meet specific process and production requirements.
Stringent Quality Standards & Reliable Lifetime Service Support
Industrial-Grade Quality: Fully enclosed, GMP-compliant stainless steel design certified by CE and ISO standards.
Comprehensive Lifetime Support: Fast 24-hour response, one-year warranty, and lifelong technical maintenance for continuous production.
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